exam Maths Puzzle Numerical Ability

Autimotive Trades - What lenth on the circumference would a 20 degree angle span on a 16 inch. Fly-wheel? Round to the nearest hundredth.

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Exercies in radicals. The problem asks for the fifth root of 147. How do we simplify or solve this expression? Thanks so much Graph the absolute value inequalities:
|x+2y|>6